Federally enforceable drinking water standards for two ubiquitous chemicals are likely about four years away—even if the EPA decides to act—the agency said March 8.

Limits for per- and polyfluoroalkyl substances would take at least 3 1/2 years to finalize, if the Environmental Protection Agency takes the amount of time it’s statutorily allocated to create drinking water standards, Eric Burneson, a director in the EPA’s groundwater and drinking water office, said at the Global Chemical Regulations Conference in...